10 



American Midland Naturalist Monograph No. 3 



the New Jersey light trap for gauging Anopheline populations, however, 

 since many of the factors relating to light reactions of mosquitoes and other 

 stimuli which may attract or repel them are still unknown. It is known that 

 Anopheles crucians, A. walkeri and A. atropos are readily attracted to these 

 traps, but A. quadrimaculatus is known to be less readily attracted. Due to 

 this fact, light traps have not been used on a large scale in connection with 

 malaria control in the southern states. 



Stable traps are used for determining densities of Anopheline mosquitoes 

 in many regions of the world. Two types, the Caribbean or Magoon trap 

 (111, 136) and the Egyptian trap (13) are in general use. Each trap con- 

 sists of a small portable building for housing an animal and is equipped 

 with an ingress baffle along each side wall (Fig. 3). In both the Caribbean 



3/4 Inch opening 



3/4 inch opening 



BUHUuuuimwm wood 



cellophone- filled screen 

 wire screen 



B 



Fig. 3. Side walls of stable traps, showing ingress baffles. 

 A, Magoon or Caribbean trap. B, Egyptian trap. 



and Egyptian traps, the ingress baffle is so constructed as to permit mos- 

 quitoes to enter the trap and to discourage their exit. A suitable animal, 

 usually a calf, small horse or goat, is kept overnight in the trap and the 

 trapped mosquitoes are caught by collectors the following morning. 



Biting Collections. — Records of the number of mosquitoes attempting to 

 feed on a favorable host give direct information as to the species causing 

 annoyance and their relative abundance. Both nocturnal and diurnal biting 

 collections are important phases of a mosquito survey. Frequent collections 

 should be made of hungry mosquitoes attracted to the collector or some 

 other host provided for this purpose. Horses, mules, cows, and other docile 

 animals are frequently used as attractants. Biting catches can be made by 



